Structural studies of a new low molecular mass organic gelator for organic liquids based on simple salt

被引:71
作者
Ballabh, A [1 ]
Trivedi, DR [1 ]
Dastidar, P [1 ]
机构
[1] Cent Salt & Marine Chem Res Inst, Analyt Sci Discipline, Bhavnagar 364002, Gujarat, India
关键词
D O I
10.1021/cm021792u
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of easy to prepare organic salt based on imidazole derivatives and cyclobutane-1,1-dicarboxylic acid have been studied for their gelation behavior after it was found that imidazolium hydrogen cyclobutane-1,1-dicarboxylate (1) can harden few organic liquids. 1 forms remarkably stable gel (remains intact for several months in an open container, gel dissociation temp T-Gel = 66 degreesC) with nitrobenzene at a very low concentration of 0.137 wt %, whereas his-imidazolium cyclobutane-1,1-dicarboxylate (2) resulted in a weak and unstable gel with nitrobenzene, indicating the importance of the free COOH group in 1 in gel formation. Molecular packing in the primary assembly unit (fibers) of xerogel of 1/nitrobenzene is successfully established based on single-crystal X-ray and X-ray powder diffraction data. The morph responsible for gel formation of 1 with nitrobenzene is found to be different from that of its xerogel. Substitution on the imidazole moiety results in nongelators.
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收藏
页码:2136 / 2140
页数:5
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